I think I've solved by myself.
Actually I've written code that checks if the flle already exists in the
memory file system.
Something like:
function fileExistsInMemoryFS(path) {
> var statbuf = FS.stat(path);
> if (!statbuf) return false;
> return FS.isFile(statbuf.mode);
> }
>
And then before calling FS.createDataFile(...) I do something like:
try {
> if (fileExistsInMemoryFS('/'+e.target.current_file_name))
> FS.unlink('/'+e.target.current_file_name);
> }
> catch(err) {
> //document.getElementById("saveFileToMemoryFS").innerHTML =
> err.message;
> }
>
It seems to work (at least on Firefox).
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